Rontgen-ray photographic machine



M. M. POM ERANZ July 12, 1927. 1,635,952

R6NTGEN RAY PHOTOGRAPHIG MACHINE Filed Nov. 25. 1925 2 Sheets$heet 1 mvgmon Mum/(E M hut/2AM:

BY jun; 754M W ATTORNEYJ' y 1927- M. POMERANZ IACHINE RONTGEN RAY PH OTOGRAPHIC Filed Nov. 25. 1925 2 snags-shut 2 mm W M A E w W M Patented July 12, 1921. a y,

i UNITED Ap nca'u nmed November 25, 1925 Serial No. 71,338.

s Figure 1 I This invention has for its primary object.

the automatic intermittent exposure of a sen: sitized film to the action of Rontgen rays for taking a series of photographs 01: a rnova ing humanorgan.

tensifyingfs'creen on each, side of the film d'aRolitgen ray reflectingplate to reflect the rays after theyhave passed through thezfilni. p Anothcrobject of this invent on is automatically to number eachexpo'sed section of thefilxniby exposing with each section one not 15 a series of numbers, andso photographing on successive'sections'their corresponding embers.- i- ,1-

.r Another object isautoniatically to a move the film the proper? distance as the diameter 29 the take-up sp if lin-crases thefwind hefilm thereon.

"In order that the nature of my invention may be clearly understood, I shall first de- I scribe in detail the mode in which I' at pres- 2 ,ent preferto, carry the invention intopracof the invention in the claims: p r

Reference is to be had to theaceompanying drawings forming part OfthlS specificatice, and then point out the yarious features tion in which the sameparts are designated 7 by likecharacters inall the res;

F gure 1 is a rearelevation of a machinc' embodying nay invention with the v casing 'ooverren oved, v

i s a sectional View on the l ne i Figure 4 is an enlargeddetail offthe 40 "t ansparentnumberingcarrier shown in Fig are l.

- Fi urefi is a diagrammatic yiewshoiying the e iectric connections between theRontgen tube and the film novingineans.

Reference character 1 represents the casr ing made of metal or any suitable material and supported by standards 2. Casing 1 is provided with an o ening 3, and anpth s in stanc islinad with ad alo gth d a d 5O "irqlit thereof "to prevent the Ront 'gen rays fro en ering e c iag a ywh re x e th ough opening 3 I i H) b u i 9d that the lRiin'tgen tube is placed in front of .L the casing, or below, the opening?) as shown a an intensif Figure 2 is a sectional viewthereo f on the" between the tube vand the opening. 4 1s a 'covering forthe' opening of any suitable material, for, example Bakelite, which exp x r cludes ordinary, light rays but transmits An he bj t v th s n n ioe 1' P l tensity each photograph by provid'lng an ,in-

Rontgen rays V Secured in the opening 3 is yingrscreen' 5 for a purpose Wellknown in the art.

" In, the'casing I provide ,a spool 6 removably supported in bearings 7 and 8, the latter which maybe springpressed for removing the spool." {Spool 6 carries a supply of sensitized 'filni QWhich in'this instanceyisiled underflidler '1'0 and over intensifying screen 5 as viewed in Figure 2, between lateral guides 50, then under idler 11 and around take-up 5 100112 which is removably supportedina manner siinilarto supply spool 6.

Take-up spool 12, inthis instance, is retated? by a; spiral spring 13 through clocki workjiears '14 and stub shaft 15 keyed to Wheel16. I

spool 12. To 'windup spring 13,1 prefer to use a multiple cam Wheel 16 niade of fibre or other suitable non-electric conducting; material. It will thus be understood that the Thecan' Wheel 16 is formed with a series of cam projections '17, Which-are steeply sloped onone side and gently sloped on the lzother' side, and, in this instance, has inibedded in it an electrical conductor 18 with V leadsrunningto every cam recess 19 onthe 'periphery'of the heel, tliusproviding'elec .tricalcontacts in each recess. As a cam follower, I preferto use a pawl 20 made of electric'conducting material, which is carried on a roc'kfshaft2l jqurnaled'in the sides of easing lfand pro ided intermediate its ends x'v'iur' ms 2 2. Rockshaft 2lis resiliently pulledtoward the front of the casing by a spring -gconnected to the casing 1 and an arm 26 carried by the rock shaft.

'Arms 22 are connected by means of links 2 coa 1esser plate .23 which is composed of any suitable Rontgen ray reflecting material. This, 'resse'r plate has secured thereto an mtensi ying'screen 27, a layer iof felt orother resi'lientfmaterial 28 being interposed ibetweenthe resser plate and theSCreen to enablethe "intensifying screen to make uniform yielding contact with the film. The presser plate formed with projections seen that a- Rontgen ray photograph taken by my method of reflecting back the rays after passing through the film and then intensifying the refiected rays will be much superior to the ordinary photograph taken with merely one intensifying screen.

hen the cam wheel 16 is rotated to wind up the spring 13 and then released, the follower or pawl 20 will. move along the periphery of the cam wheel and, as will be seen, the presser plate 23 and screen 27 secured thereto, will be lifted when the follower rides on a cam projection 17, and pulled back under the action of spring 25 when the follower rides in the cam recess 19.

When the follower rides in a recess 19 and the presser plate is pulled by spring 25 into contact with the film, the motion of the film is momentarily interrupted by reason of said contact. However, the spring 13 also is r0- tating take-up spool 12 simultaneous with the rotation of the multiple cam wheel. hen the film is momentarily stationary, the spring is acting to lift the plate 23 by the action of the steep side of the cam projection on the follower 20. The film on the take-up spool is momentarily tightened but no excessive tension is placed thereon as the prcsscr plate is almost immediately removed from the film.

it will thus be seen that I have provided a means for automatically and intermittently moving the film, and for raising and releasing the presser plate automatically in harnion r with the intern'iittent motion of the film, that is, the presser plate is automatically raised when the film is moving and lowered when the film is stationary.

To more the film the proper distance past the opening 3 the diameter of the spool 12 increases with the winding of the film thereon, I prefer to grade the cam projection spacings on the cam wheel 16 to corre spend with the increasing diameter of the take-up spool as the film is wound thereon.

As will be realized, it is necessary that the film he not exposed to the Rontgen rays while the film is in motion. To attain this result, I prefer automatically to open the tgen tube circuit when the film is movand close said circuit when the film is As shown in Figs. 1 and 5, the

ing. stationary.

electric conductor 18 has connected thereto a lead 31 by means of a removable plug 32.

Follower 20 also has connected therewith a lead 33, these leads being part of an electric circuit for the Iliintgen tube (not shown). The Hontgen tube is connected across the open ends of the wires shown in Figure 5.

In the circuit, I prefer to intcrpose an ordinary timer 34 which automatically limits exactly the duration of each exposure. also inter-pose a hand switch 85 in the circuit for opening and closing the tube circuit at will.

From the above, it will. be understood that when the follower 2O rides into the recess it) on the multiple cam wheel 16, it makes contact with a lead of the conductor 15% and so clot-cs the circuit and energizes the lliiutgcu tube. As the film is momentarily stationary when the follower is in the recess, a. photograph is taken, the exact length of time of exposure being determined by the timer 34;. When the follower rides on the cam projection 1.7, the film is in motion because of the rotation of the spool 12 by spring 13, and, at the same time, the circuit is open as the follower is no longer in contact with a lead of the conductor 18.

ills itis advantageous to successively number each exposed section of film, I employ a transparent carrier 36 having numbers 37 thereon which are opaque to Rontgcn rays, and so placed that a number of the carrier is in position for exposure. In this instance, I use a disk for the carrier, and this disk is rotated in harmony with the film moving means by means of gear 38 attached to the clockwork 14. As the film is moved, a new number appears in the field of exposure and is photographed on the section of fihn.

It will thus be seen that I have provided a ll-ontgcn ray photographic machine that automatically and intermittently moves the film into and out of position for exposure, closes the Itiintgen tube circuit when the film is stationary and opens the circuit when the film is moving, numbers each successive section of exposed film with a new number, always moves the film a constant distance, and intensifies and makes much clearer than ordinarily is possible each photograph.

It is evident that many changes may be made in the specific construction and arrangement described without departing from the boundaries of my invention as defined by the following claims.

I claim as my invention:

1. In a Rontgen ray machine, the combination with a Rontgen tube and electric circuit therefor, film supply and take up spools for moving a film into and out of position for exposure. means for operating the film take-up spool, and means operated by the .film .moving means for intermittently arresting the motion of the film and its take up spool, of an electric switch operated in harmony with the film and take up spool for ill) automatically closing the tube circuit'f'when the motion of the film is interrupted and opening the circuit when said motion is re sumed. 1 I y p 2.111 a Rent-gen ray machine, thecombination, with a Rontgen tube andelectric circuit therefor, of means for movinga film,

into andout of position for exposure, means for intermittently arrestmg the motion of the film, including a 'multiple cam wheel operated by the film moving means, and'a; switch operated in harmony with the cam wheel for closing the tube circuit when the motion of the film is interrupted and opening the circuit When said motion is resumed. 3. The structure 1n-cla1m2in wh ch the switch comprises electric contacts corresponding to the projections on the cam wheel and a movable contact member included in the film arrest-mg means. I

4. In a Rontgen ray machine,thecombination with a'Rontgen tube and,e1ectric,cir cult therefor, means for moving a film into and out of position for exposureyand a' spring-pressed plate for engaging and arresting the motion of the film, ofmeans operated by the film moving'meanslforintermittently operatingthe film arresting plate,

and an electric switch operated in harmony with said film arresting plate for automati cally closing the tube oircuitwhentl 'e motion of the fi'lm is interrupted andiop'ening the circuitwhcn said motion is l esumed.

5. The structure in claim t where the plate operating means comprises a multiple cam wheel operatedin harmony with the film moving means, a cam follower, a rock shaft carrying said follower, arms on said rock shaft, and links connecting said, armswith said late. 6. n a Rontgen ray machine, the combi- I nation with a Rtintgen tubeand electric cirthe take-up spool.

cuittherefor, acasing provided, with an opening, and means for moving a film in said casing past said opening, of an intensitying screen on each side of the film, and a screen farthest from the Rontgen tube.

' in a Rontgen ray machine, the combination with a Rontgen tube and electric circuit therefor, a casing provided with an opening, and means for moving a film in said casing past said opening, of an intensifying screen on each side ofthe film, a Rontgen ray reflecting plate secured to the screen farthest frointhe tube, and means for removing said plate and screen secured thereto from the film to permit the motion of the film, andrestoring the plate and screen to contact with the film to arrest the motion'of the film. a e e 8. In a Rontgen ray machine, the combireclprocating reflecting plate secured to the nation "with a Rontgentube and electric circuit therefor, film supply and take-up spools for moving afilm into and out of po-v sition for exposure, of means for intermittently arresting the motion of the fi'lm including a multiple cam wheel connected with l'he film moving means andhaving'projedv tions' thereon which are graded in spacing to correspond. with the increasing diameter of 9. In a Rontgen ray machine, the combif nation with a Rontgen tubeand electriccirecuit therefor, film supply andtake-up spools,

MAURICE M. POMERAN Z. 

